Bookshelf Speaker Reviews

L/R Sensitivity:
90.5 dB from 500 Hz to 2 kHz

Center Sensitivity:
94 dB from 500 Hz to 2 kHz

Surround Sensitivity:
92 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the RB-61 II L/R (purple trace), RC-62 II center channel (green trace), RS-62 II surround (red trace), and SW-310 subwoofer (blue trace). All passive loudspeakers were measured with grilles at a distance of 1 meter with a 2.83-volt input and scaled for display purposes.

The RB-61 II’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.27/–2.40 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 50 Hz, and the –6-dB point is at 45 Hz. Impedance reaches a minimum of 4.82 ohms at 174 Hz and a phase angle of –49.43 degrees at 106 Hz.

The RC-62 II’s listening-window response measures +3.39/–3.88 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +3.96/–3.75 dB from 200 Hz to 10 kHz. The –3-dB point is at 72 Hz, and the –6-dB point is at 60 Hz. Impedance reaches a minimum of 4.23 ohms at 195 Hz and a phase angle of –47.20 degrees at 111 Hz.

The RS-62 II’s three-face averaged response measures +5.53/–2.90 dB from 200 Hz to 10 kHz. The –3-dB point is at 78 Hz, and the –6-dB point is at 66 Hz. Impedance reaches a minimum of 4.08 ohms at 203 Hz and a phase angle of –62.17 degrees at 120 Hz.

The SW-310’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 28 Hz and the –6-dB point is at 26 Hz. The upper –3-dB point is at 146 Hz with the Lowpass control set to maximum. —MJP